Triethylamine → (S)-1-((10-chloro-6,7-dihydro-4-oxo-3-phenyl-4H-benzo(a)quinolizin-1-yl)carbonyl)-3-ethoxypyrrolidine

HRID 1902145Notes

Reaction equation

HRID 1902145 reaction equation
[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[CH2:14][CH2:13][N:12]3[C:7](=[C:8]([C:22]([OH:24])=O)[CH:9]=[C:10]([C:16]4[CH:21]=[CH:20][CH:19]=[CH:18][CH:17]=4)[C:11]3=[O:15])[C:6]=2[CH:25]=1.CN(C1C=CC=CN=1)C.C(Cl)(=O)C(Cl)=O.C(N(CC)CC)C.Cl.[CH2:49]([O:51][C@H:52]1[CH2:56][CH2:55][NH:54][CH2:53]1)[CH3:50].C(O[C@H]1CCNC1)C>C(OCC)(=O)C>[Cl:1][C:2]1[CH:3]=[CH:4][C:5]2[CH2:14][CH2:13][N:12]3[C:7](=[C:8]([C:22]([N:54]4[CH2:55][CH2:56][C@H:52]([O:51][CH2:49][CH3:50])[CH2:53]4)=[O:24])[CH:9]=[C:10]([C:16]4[CH:17]=[CH:18][CH:19]=[CH:20][CH:21]=4)[C:11]3=[O:15])[C:6]=2[CH:25]=1

Participants

8

Reactant 6

HCID 8471Triethylamine2×HCID 218852-DimethylaminopyridineHCID 65578Oxalyl chlorideHCID 11116030(3S)-3-ethoxypyrrolidineHCID 14666744HCID 14666744, compoundHCID 67731241HCID 67731241, compound

Product 1

HCID 3045375(S)-1-((10-chloro-6,7-dihydro-4-oxo-3-phenyl-4H-benzo(a)quinolizin-1-yl)carbonyl)-3-ethoxypyrrolidineYield 85%

Reagents, catalysts & solvents 1

HCID 8857Ethyl AcetateSolvent

Procedure

A suspension of 8.79 g (25 mmol) of 10-chloro-4-oxo-3-phenyl-6,7-dihydro-4H-benzo[a]quinolizine-1-carboxylic acid (X) in 125 ml of ethyl acetate was treated with 0.076 g (0.625 mmol) of dimethylaminopyridine and 3.49 g (27.5 mmol) of oxalyl chloride. The mixture was then stirred at 600 for 3 hours. The yellow solution (XI) was concentrated and the residue was taken up in 125 ml of toluene. This was treated either with 5.26 g (52 mmol) of triethylamine and 3.94 g (26 mmol) of (S)-3-ethoxypyrrolidine hydrochloride or with 2.63 g (26 mmol) of triethylamine and 3.0 g (26 mmol) of (S)-3-ethoxypyrrolidine and stirred for 4 hours. Subsequently, the solution was washed in succession with 100 ml of water, 100 ml of 1N HCl, 100 ml of 0.5N KHCO3 and then again with 100 ml of water. The individual aqueous phases were extracted with 100 ml of toluene and the combined organic extracts were dried with 20 g of Na2SO4. The residue obtained after filtration and concentration was dried at 50°/0.1 mbar/2 h. Compound I was obtained in 85% yield, based on the acid, after purification by recrystallization from acetone/water and acetone/hexane. M.p. 133°-134°.

Workup

  1. concentrationThe yellow solution (XI) was concentrated
  2. stirringstirred for 4 hours
  3. washSubsequently, the solution was washed in succession with 100 ml of water, 100 ml of 1N HCl, 100 ml of 0.5N KHCO3
  4. extractionThe individual aqueous phases were extracted with 100 ml of toluene
  5. dry with materialthe combined organic extracts were dried with 20 g of Na2SO4
  6. customThe residue obtained
  7. filtrationafter filtration and concentration
  8. customwas dried at 50°/0.1 mbar/2 h

Sources & evidence

ORD record
ord-48689e6983b64e96a04270082be6eb86
Source dataset
uspto-grants-1996_11
Patent number
US05578728

Reaction notes

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